diff --git a/.github/workflows/pythonapp.yml b/.github/workflows/pythonapp.yml
index 70bba55..76e0c07 100644
--- a/.github/workflows/pythonapp.yml
+++ b/.github/workflows/pythonapp.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set up Python 3.9
       uses: actions/setup-python@v2
       with: